[jira] [Created] (TS-3999) Add option to go direct for specific parent entry

["Alan M. Carroll (JIRA)" <ji...@apache.org>]

Alan M. Carroll created TS-3999:
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             Summary: Add option to go direct for specific parent entry
                 Key: TS-3999
                 URL: https://issues.apache.org/jira/browse/TS-3999
             Project: Traffic Server
          Issue Type: Improvement
          Components: Parent Proxy
            Reporter: Alan M. Carroll


We want to use parenty proxying in a peer relationship so that a host can be both a parent and child in general but only for a specific URL. Currently this can be done using the CARP plugin but that can create some difficulties. Being able to specify that one parent in the list is actually direct to origin would make that much easier.

The current suggestion is to overload the port specifier as a indicator of direct. For example, if you had three hosts in a pod, {{rikku}}, {{tidus}}, and {{yuna}}, then you would configure the parent proxying on {{tidus}} as
{code}
"tidus:@direct, yuna:8080, rikku:8080"
{code}
while the configuration on {{yuna}} would be
{code}
"tidus:8080, yuna:@direct, rikku:8080"
{code}.
Similarly for {{rikku}} the port would be changed to "@direct" just for the "rikku" parent. I discussed several configuration options for this with [~dcarlin] and putting the override directly in the parent list was his preferred mechanism.



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